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Nancy
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Convert zeros to NAN

Asked by Nancy
on 14 Jun 2011
I have a matrix (N rows and M columns). It consists of integer values. I want to convert all the zero values from rows 1:N and columns 3:M to NaN. Is there any way to do so.
Thanks, Nancy

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Sean de Wolski
Answer by Sean de Wolski
on 14 Jun 2011
 Accepted Answer

One of many ways
idx = ~A;
idx(:,1:2) = false;
A(idx) = nan;

  3 Comments

Nancy
on 14 Jun 2011
Thanks Sean. It works.
In your commands, step two ignores the values in columns one and two. Am I correct?
Sean de Wolski
on 14 Jun 2011
Yes. It sets any value that was a zero value (the ~ (not) command) in the first definition to be false so that it doesn't show up in the nan assignment.
Nancy
on 14 Jun 2011
Thanks. :)

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